69671790505 has 16 divisors (see below), whose sum is σ = 87485895504. Its totient is φ = 53207781120.

The previous prime is 69671790491. The next prime is 69671790541. The reversal of 69671790505 is 50509717696.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2715904 + 69669074601 = 1648^2 + 263949^2 .

It is not a de Polignac number, because 69671790505 - 2⁵ = 69671790473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3543066 + ... + 3562675.

It is an arithmetic number, because the mean of its divisors is an integer number (5467868469).

Almost surely, 2^69671790505 is an apocalyptic number.

It is an amenable number.

69671790505 is a deficient number, since it is larger than the sum of its proper divisors (17814104999).

69671790505 is a wasteful number, since it uses less digits than its factorization.

69671790505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7105836.

The product of its (nonzero) digits is 3572100, while the sum is 55.

The spelling of 69671790505 in words is "sixty-nine billion, six hundred seventy-one million, seven hundred ninety thousand, five hundred five".